Marmoush, a big-money signing from Eintracht Frankfurt in January, opened his City account in sensational style, scoring three times in the space of 14 minutes at Etihad Stadium.

City lost 5-1 to Arsenal in their last top-flight outing and came into this clash on the back of a dramatic UEFA Champions League defeat to Real Madrid, but Pep Guardiola's team returned to form in emphatic fashion.

Marmoush opened the floodgates in the 19th minute when he lobbed Martin Dubravka after latching on to Ederson's superb pass.

The Egyptian doubled up when he drilled in via a deflection off Kieran Trippier five minutes later, before rounding out his hat-trick with a composed, first-time finish from Savinho's cutback.

Lewis Milley had Newcastle's best attempt of a low-key second half, before James McAtee rounded off City's rout when he hooked in from a corner in the 84th minute.

Erling Haaland went down clutching his knee late on to cause some stress for Guardiola, although the striker appeared to be all right as he made his way to the bench.

City faces Real Madrid in the second leg of their UEFA Champions League play-off this week, before taking on Liverpool in a blockbuster Premier League clash next weekend.